/* ============================================
   Album App — Design System
   Dark glassmorphism theme with gradient accents
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ---------- CSS Variables ---------- */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --bg-glass-border: rgba(255, 255, 255, 0.1);
    --bg-input: rgba(255, 255, 255, 0.06);
    --bg-input-focus: rgba(255, 255, 255, 0.1);

    --text-primary: #f0f0f5;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --accent-start: #6366f1;
    --accent-end: #a855f7;
    --accent-solid: #8b5cf6;
    --accent-hover: #a78bfa;

    --success: #34d399;
    --warning: #fbbf24;
    --danger: #f87171;
    --info: #60a5fa;

    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(139, 92, 246, 0.3);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.2);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

a { color: var(--accent-hover); text-decoration: none; transition: var(--transition-fast); }
a:hover { color: var(--text-primary); }

img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1 { font-size: 2rem; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 500; }

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Layout ---------- */
.app-container {
    position: relative;
    z-index: 1;
    min-height: 100vh;
}

.content-wrapper {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Navbar ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
}

.navbar-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.navbar-brand svg {
    width: 28px;
    height: 28px;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.navbar-user .user-name {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.navbar-user .user-avatar {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    color: white;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
    color: white;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--bg-glass-border);
    color: var(--text-primary);
}

.btn-danger {
    background: rgba(248, 113, 113, 0.15);
    color: var(--danger);
    border: 1px solid rgba(248, 113, 113, 0.2);
}
.btn-danger:hover {
    background: rgba(248, 113, 113, 0.25);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 12px;
}
.btn-ghost:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn-icon.sm {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
}

/* ---------- Form Elements ---------- */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9375rem;
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    background: var(--bg-input-focus);
    border-color: var(--accent-solid);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.form-input::placeholder {
    color: var(--text-muted);
}

textarea.form-input {
    resize: vertical;
    min-height: 80px;
}

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%239ca3af' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

/* ---------- Cards ---------- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: var(--bg-glass-border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-body {
    padding: 20px;
}

/* ---------- Glass Card ---------- */
.glass-card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-lg);
}

/* ---------- Album Grid ---------- */
.albums-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.album-card {
    cursor: pointer;
    text-decoration: none;
    color: inherit;
}

.album-card .album-cover {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: var(--bg-secondary);
    background-size: cover;
    background-position: center;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    position: relative;
    overflow: hidden;
}

.album-card .album-cover .cover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.6) 0%, transparent 50%);
}

.album-card .album-cover .photo-count {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: white;
}

.album-card .album-info {
    padding: 16px;
}

.album-card .album-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.album-card .album-meta {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.album-empty-cover {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.album-empty-cover svg {
    width: 48px;
    height: 48px;
    opacity: 0.3;
}

/* ---------- Photo Grid ---------- */
.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
}

.photo-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    background: var(--bg-secondary);
}

.photo-item .photo-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s ease;
    /* Download protection: use background-image instead of <img> */
}

.photo-item:hover .photo-bg {
    transform: scale(1.05);
}

.photo-item .photo-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 40%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 12px;
    /* Anti-download layer */
    pointer-events: none;
}

.photo-item:hover .photo-overlay {
    opacity: 1;
}

.photo-item .photo-date {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

.photo-item .photo-location {
    font-size: 0.6875rem;
    color: rgba(255,255,255,0.7);
}

/* ---------- Photo Lightbox / Viewer ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.lightbox.active {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.lightbox-image-container {
    position: relative;
    max-width: 90vw;
    max-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-image-container .protected-image {
    max-width: 90vw;
    max-height: 80vh;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    /* Anti-download */
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

/* Anti-download transparent overlay */
.lightbox-image-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: transparent;
    pointer-events: none;
    z-index: 2;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 1001;
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1001;
    background: rgba(255,255,255,0.1);
    border: none;
    color: white;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

.lightbox-nav:hover { background: rgba(255,255,255,0.2); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 20px 24px;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
    z-index: 1001;
}

.lightbox-info .photo-title {
    font-weight: 600;
    margin-bottom: 4px;
}

.lightbox-info .photo-meta {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.lightbox-info .photo-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.lightbox-info .hashtags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

/* ---------- Hashtag Tags ---------- */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-hover);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    transition: var(--transition-fast);
    cursor: pointer;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.tag:hover {
    background: rgba(139, 92, 246, 0.25);
}

.tag .tag-remove {
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.625rem;
    cursor: pointer;
    opacity: 0.6;
    transition: var(--transition-fast);
}

.tag .tag-remove:hover {
    opacity: 1;
    background: rgba(255,255,255,0.2);
}

/* ---------- View Tabs (Grid / Map / Calendar) ---------- */
.view-tabs {
    display: flex;
    gap: 4px;
    padding: 4px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.view-tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.view-tab.active {
    background: var(--accent-gradient);
    color: white;
}

.view-tab:hover:not(.active) {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

/* ---------- Map Container ---------- */
.map-container {
    width: 100%;
    height: 500px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-top: 16px;
}

/* ---------- Calendar View ---------- */
.calendar-grid {
    display: grid;
    gap: 24px;
    margin-top: 16px;
}

.calendar-group {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.calendar-group-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.calendar-group-date {
    font-size: 1.125rem;
    font-weight: 600;
}

.calendar-group-count {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.calendar-photos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 6px;
}

/* ---------- Upload Area ---------- */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent-solid);
    background: rgba(139, 92, 246, 0.05);
}

.upload-area svg {
    width: 48px;
    height: 48px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.upload-area p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.upload-area .upload-hint {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.upload-progress {
    margin-top: 16px;
}

.progress-bar {
    height: 4px;
    background: var(--bg-card);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
    width: 0%;
}

/* ---------- Share Section ---------- */
.share-section {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.share-link-display {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.share-link-display input {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
}

.share-list {
    margin-top: 16px;
}

.share-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.share-item:last-child {
    border-bottom: none;
}

.share-item .share-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.share-item .share-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-card-hover);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.share-item .share-name {
    font-size: 0.875rem;
    font-weight: 500;
}

.share-item .share-permission {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 500;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 28px;
    animation: slideUp 0.3s ease;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.25rem;
    padding: 4px;
    transition: var(--transition-fast);
}

.modal-close:hover { color: var(--text-primary); }

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* ---------- Auth Pages ---------- */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    z-index: 1;
}

.auth-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--bg-glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.auth-card .auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-card .auth-logo {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-card .auth-subtitle {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.auth-card .auth-error {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.2);
    color: var(--danger);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    margin-bottom: 20px;
}

.auth-card .auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ---------- Page Header ---------- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 24px 0 0;
}

.page-header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.breadcrumb a { color: var(--text-secondary); }
.breadcrumb .separator { opacity: 0.4; }

/* ---------- Section ---------- */
.section {
    margin-top: 24px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
}

/* ---------- Empty State ---------- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state h3 {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.empty-state p {
    font-size: 0.9375rem;
    max-width: 400px;
    margin: 0 auto 20px;
}

/* ---------- Error Pages ---------- */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.error-container {
    text-align: center;
}

.error-code {
    font-size: 6rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 16px;
}

.error-container h1 {
    margin-bottom: 8px;
}

.error-container p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ---------- Toast Notification ---------- */
.toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 14px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    min-width: 280px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--info); }

/* ---------- Sidebar (Filters) ---------- */
.album-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 24px;
    padding: 24px 0;
}

.album-sidebar {
    position: sticky;
    top: 88px;
    align-self: start;
}

.sidebar-section {
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    margin-bottom: 16px;
}

.sidebar-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.hashtag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* ---------- Animations ---------- */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-solid);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .album-layout {
        grid-template-columns: 1fr;
    }
    .album-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 1.5rem; }
    
    .albums-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
    .photos-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .navbar-inner {
        padding: 0;
    }
    .auth-card {
        padding: 28px 20px;
    }
}

@media (max-width: 480px) {
    .albums-grid {
        grid-template-columns: 1fr;
    }
    .photos-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 4px;
    }
    .content-wrapper {
        padding: 0 16px;
    }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255,255,255,0.2);
}

/* ---------- Anti-download utilities ---------- */
.no-select {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-user-drag: none;
    -webkit-touch-callout: none;
}

.no-save {
    pointer-events: none;
}